Spraying mechanism



3 1940- A. E. GLEASON 2,210,934

SPRAYING MECHANISM Filed Aug. 4, 1939 fi E i Z 6 INVENiOIf. BY C iATTORNEY.

Patented Aug. 13, 1940 --UNITED STATES PATENT OFF-ICE I I; V: 2,210,934p j SPRAYING MECHANISM Alton EL GIeason, Springfield, Mass. ApplicationAugusta 1939, Serial-No. 288,400

My invention relates to improvements in road building'or sprayingapparatus and it is directed more particularly to improvements inapparatus for distributing or spraying road buildingmaterial. The novelfeatures of the invention are-directed tothe provision of apparatusfordistributing or spraying road building material in a more or less liquidcondition and this apparatus is characterized by its simplicity in formand its efficiency in operation.

'Heretofore, it has been customary in connection' with road building orroadsurfacing opera tions to provide two trucks, one of which carriesnot only a tank for supplying the building-material but also a manuallyoperated pump which pumps the material so as to facilitate spraying, andthe other of which carries the crushed rock for use in the road underconstruction." Such a procedure entails not only much extra equipmentbut also much extra labor, all of which is costly; There is the furtherobjection to the prior art devices that the spraying material,whichusually includes some bituminous material such has tar, coal tarpitch, or the like is prone to congeal and to harden so as to clog thepump and the delivery pipe and the nozzle thereof.

According to my invention, the spraying material is discharged from asupply tank by means of air pressure which comes from an air tankwhereat the connections are so arranged that air may be forced throughthe delivery pipe and the nozzle thereof so as to overcome theobjectionable clogging. Not only is the apparatus simple in its form andefficient in its operation, but alsoit is possible to employa lessernumber of trucks to do -a certain piece of road construction in view ofthe compactness of the same.

' It is an object of the invention to provide a mechanism whereby thequantity and quality of the binder material which is distributed over acertain area of road will be accurately controlled. It is another objectto provide such a control whereby the same may be easily and quicklychanged according to the desires of the operator. It is a still furtherobject to provide a means whereby the binder material may be thoroughlyremoved from the device when the same is not in use so as to preventclogging of the vital pipe lines leadingto and from the various tanks.

Various other novel features and advantages of the invention will beobserved from the following description of the preferred form of theinvention reference being had to the accompanying drawing wherein:

Fig. 1 is aside elevational view of a motor truck .tion 38 to the pipe24.

showing the spraying apparatus of the invention associated therewith;

Fig. 2 is a sectional elevational view of the de vice of the inventionthrough the supply tank thereof for the purpose of spraying; and r Fig.3 is a side elevational view of the nozzle of the spraying apparatus ofthe invention.

Referring nowto the drawing more in detail, the invention-will be fullydescribed. Like numerals in different figures refer to like parts.

In Fig. 1, a truck is generally indicated by 2 which has a tilting truckbody 4. The body 4 is adapted to carry road building material, such ascrushed rock or the like as indicated by 6. A storage tank 8 likewisedisposed in said body is provided for spraying over the road buildingmaterial and a supply tank In for the binding material also used inconjunction therewith is carried by the truck at its rearendsubstantially as shown. I 1

At 12 is indicated the motor of the truck 2 which'may have" a gear l4disposed on the fly wheel l6 thereof. An air compressoris represented at3 which has a gear 20 in mesh with the gear I4 of the flywheel so thatas the motor I 2 is operated a compressor is simultaneously placed inoperation so asto supply air to an air tank 2| through a conduit 22. I

An air pipe 24 extends from this tank 2| and there is convenientlylocated therein a valve 26, which valve being of a'variable constantpressure type is manually adjustable so that the air pressure in thepipe 24 is of some predetermined constant value. A pipe 28 extends fromthe storage tank 8 to the supply tank Ill, and in this pipe 23 there isa valve indicated by the reference 30.

The binding material flows from the storage tank 8 to the supply tank I0when the valve 30 is open so that the supply tank is supplied with'adesired quantity of the binding material. An air inlet pipe 32 extendsfrom the air line. 24 to the supply tank I0, and in this line 32 thereis a shut-off valve 34. A pipe 36 extends downwardly within the supplytank l0 substantially as shown and it is connected by means of a connec-There is a valve 40 in the connection 38. Other valves 42 and 44 in theline 24 are provided as shown. Conduit 46 extends from the pipe 24 and anozzle generally indicated by 48 on the outer end of the conduit has adischarge head "50 at its extremity. When the supply tank In contains asupply of material to be sprayed, the valves 30 and 42 are closed whilethe valves 34, 40 and 44 are opened.

With the engine of the vehicle in operation,

air is delivered to the air tank 2| so that with the valve 26 set todeliver air at some predetermined air pressure, air is forced into thesupply tank 10 so that the liquid from the tank passes out therefromthrough the conduit 46 whereupon it is discharged by the spray nozzle 48and the discharge head 56.

The air pressure may be varied depending upon the consistency of thematerial being sprayed all to the end that the material is sprayed moreefficiently and more economically than has heretofore been possible.

Whereas in prior art devices which have been previously referred to,where only 150 gallons of the spraying material has been pumped by handper day for use with only 3 or 4 tons of rock, the apparatus of thisinvention permits 700 gallons to be sprayed in conjunction with 15 or 16tons of rock which have been spread upon the roadway.

To fill the supply tank H], the air supply is out off and the valve 30is opened whereby the tank l may be readily and easily filled with thespraying material which is to be sprayed. To overcome clogging of thedischarge conduit or the nozzle or the head in association therewith,the valves 34, 30 and 40 may be closed and the valves 42 and M may beopened so that the air passes through pipes 24 and through conduit 46without even entering the tank l8.

If it is desired the storage tank may be placed on the truck bodyinstead of in the dump truck itself so that said dump truck may beraised or lowered, irrespective of the storage tank.

According to my invention, it is possible to carry-the spraying materialwith a supply of crushed rock or the like all in the same vehiclethereby efiecting economy in road construction equipment and labor.Byreason of the novel construction. of this apparatus, the sprayingmaterial is more readily and more economically sprayed while at the sametime the equipment may if desired be flushed with air so as to assist inmaintaining this efiicient-performance.

While I have described the, invention in great detail and with respectto the present preferred form thereof, it is not desired to be limitedthereto since changes and modifications may be made therein withoutdeparting from the spirit and scope of'the invention. The invention maybe embodied in other specific forms Without departing from the essentialcharacteristics thereof. Thepresent embodiments are therefore to beconsidered in all respects as illustrative and not restrictive, thescope of the invention being indicated by the appended claimsrather thanby the foregoing description, and all changes which come within themeaning and range of equivalency of the claims are therefore intended tobe embraced therein.

What it is desired to claim and secure by Letters Patent of the UnitedStates is:

1. Portable apparatus for spraying liquidbinding material and the likeonto roads comprising in combination, a storage tank for bindingmaterial, a supply tank for binding material, connections between saidstorage tank and said supply tank including valve means, a device forsupplying air under pressure and an air supply tank permanentlyconnected thereto, a spray nozzle, a single main conduit connecting saidair tank and said spray nozzle including constant pressure valve meansfor controlling the fiow of air in said conduit from said air supplytank, a first connection between said main conduit and said supply tankfor conducting air into said tank including independently operable valvemeans for controlling the flow of air from said main conduit into saidsupply tank, a second connection from said main conduit into anddownwardly ofv said supply tank including independently operable valvemeans, a valve in said main conduit between said first and secondconnections,- and a valve in said main conduit between said nozzle andsaid second connection, all adapted and arranged in co-operativerelationship whereby air may be directed either from said main conduitthrough said first named said connection into said supply tank to force.liquid therefrom out through said second connection into said mainconduit and out said spray nozzle, or through said main conduit and outsaid spray nozzle past said supply tank, or from said main conduitthrough said supply and into said storage tank.

2. Portable apparatus for spraying liquidbinding material and the likeonto roads comprising in combination, a storage tank for bindingmaterial, a supply tank for binding material, connections between saidstorage tank and said supply tank including valve means, a device forsupplying air under pressure andan air supply tank permanently connectedthereto, a spray nozzle, a single main conduit connecting said air tankand said spray nozzle, a first connection between said main conduit andsaid supply tank for conducting air into said tank includingindependently operable valve means for controlling the flow of air fromsaid main conduit into said supply tank, a second connection from saidmain conduit into and downwardly of said supply tank includingindependently operable valve means, a valve in said main conduit betweensaid first and second connections, and a valve in said main conduitbetween said nozzle and said second connection, all adapted and arrangedin co-operative relationship whereby air may be directed either fromsaid main conduit through said first named said connection into saidsupply tank to force liquid therefrom out through said second connectioninto said main conduit and out said spray nozzle, or through said mainconduit and out said spray nozzle past said supply tank.

ALTON E. GLEASONF

